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all you'll need is a fuel rail adaptor---check out any nitrous dealer--they all make & sell em. Mine is made by nitrous express & i bought it at summitracing. They range between $40-75
i bought my electrical fuel pressure gauge from lethal performance, it also had an option on it to include a fuel adaptor for like 40 dollars i believe.
it should come with everything except that adaptor. Also im sure you are aware, but some sort of mounting solution like a speed of sound pillar or what not
Oh of course, I'm having it all done by Brenspeed. They are providing my 2 pod SOS A-piller and my Z-Series Boost gauge, I'm just providing the Fuel Pressure gauge for them to install.